>>>>In my university sculpture class, we used a type of silicon which was
purchased from a hardware store; it comes in tubes, is extracted with a gun-
type deal, and must be extracted under water. It can then be taken out and
placed around the item to be cast; a while later (can't remember how long)
becomes cured. A nice, flexible mold results.
sorry I don't know the product name!
This substance is 100% silica......the same stuff that you use to caulk
things with......but be sure to get the clear kind so that you can check for
air bubbles. :) It cures with water and doesn't stick to the skin, but you
must use dishsoap in the water. oh.....and it sure does stink!! It usually
takes about 40 minutes to set. I really enjoyed the results, but I wouldn't
recommend it being used in elementary classes.